Question

What is the measure of angle B in degrees?

Answer 1

119°

Explanation:

51+180-112= 119°

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Answer 2

∠ B = 119° ✅

Step-by-step explanation:

We know that,

`\sf\purple{Sum\:of\:angles\:on\:a\:straight\:line}` = 180°

➡ ∠ C + 112° = 180°

➡ ∠ C = 180° - 112°

➡ ∠ C = 68°

Also,

`\sf\pink{Sum\:of\:angles\:of\:a\:triangle}` = 180°

⇝ ∠ A + 51° + 68° = 180°

⇝ ∠ A + 119° = 180°

⇝ ∠ A = 180° - 119°

⇝ ∠ A = 61°

Again,

`\sf\blue{Sum\:of\:angles\:on\:a\:straight\:line}` = 180°

✒ ∠ A + ∠ B = 180°

✒ 61° + ∠ B = 180°

✒ ∠ B = 180° - 61°

✒ ∠ B = 119°

Hence, the measure of angle B is 119°.

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